Implemented file_watchers_manager.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Part of logic was moved to file_watchers_manager from file_watcher. Done cleanup in file_watcher.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
More cleanup in syndir.cc. Finished file evens manager refactor.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Updated Syndir.pro

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>